{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,7]],"date-time":"2026-04-07T20:58:53Z","timestamp":1775595533224,"version":"3.50.1"},"reference-count":57,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2025,3,26]],"date-time":"2025-03-26T00:00:00Z","timestamp":1742947200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["52173106"],"award-info":[{"award-number":["52173106"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["22375154"],"award-info":[{"award-number":["22375154"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Regenerated cellulose (RC) films with abundant sources and low processing costs are considered to be excellent biodegradable and recycled packaging materials. However, there is still a problem to be solved: the poor strength of RC films in the wet state. Polyurethane (PU) possesses excellent mechanical properties, biocompatibility and biodegradability. In this work, a PU coating is successfully introduced on the RC film surface via a facile surface engineering strategy, followed by plane hot-pressing process, and the RC@PU films are obtained. Notably, under wet conditions, RC@PU films show outstanding mechanical properties (fracture stress of 22.5 MPa, fracture strain of 75.9%, toughness of 10.6 MJ\/m3), which are greater than those of the pure RC films (18.9 MPa, 56.5%, 6.9 MJ\/m3). In addition, RC@PU films play an important role in anti-water evaporation tests. Moreover, RC@PU films exhibit excellent biodegradability, which can be completely degraded in a natural environment in about 70 days. This work provides a simple and feasible surface engineering strategy for developing RC films with excellent wet strength and biodegradability.<\/jats:p>","DOI":"10.3390\/polym17070890","type":"journal-article","created":{"date-parts":[[2025,3,28]],"date-time":"2025-03-28T10:54:48Z","timestamp":1743159288000},"page":"890","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Regenerated Cellulose Films Coated with Waterborne Polyurethane with Enhanced Mechanical Properties"],"prefix":"10.3390","volume":"17","author":[{"given":"Renxiang","family":"Xiong","sequence":"first","affiliation":[{"name":"Hubei Engineering Center of Natural Polymers-Based Medical Materials, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jinping","family":"Zhou","sequence":"additional","affiliation":[{"name":"Hubei Engineering Center of Natural Polymers-Based Medical Materials, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,3,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"8667","DOI":"10.1007\/s10570-020-03389-y","article-title":"Synthesis of thermoplastic cellulose grafted polyurethane from regenerated cellulose","volume":"27","author":"Hou","year":"2020","journal-title":"Cellulose"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"3374","DOI":"10.1021\/acs.biomac.0c00805","article-title":"Thermal degradation of cellulose filaments and nanocrystals","volume":"21","author":"Hamad","year":"2020","journal-title":"Biomacromolecules"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"286","DOI":"10.1016\/j.carbpol.2018.07.028","article-title":"Stereoselectively water resistant hybrid nanopapers prepared by cellulose nanofibers and water-based polyurethane","volume":"199","author":"Sethi","year":"2018","journal-title":"Carbohydr. 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